I have a 9 mm AR style carbine. It currently has a red dot style sight on it. I was thinking I would like to put backup sights on it, just for the heck of it as much as anything else. My scope is mounted directly on the rail so there is no good way to mount backup sights except on a 45 degree mount. I have never tried that style of sight before. I can't imagine shooting a rifle canted at 45 degrees, but I don't see any other way to use that kind of sight. Just curious what the deal is.